topic Accessing the End Points of a Polyline Segment in ArcObjects SDK Questions

Accessing the End Points of a Polyline Segment

TomGiles — Tue, 14 Dec 2010 17:33:47 GMT

This seems so easy in theory, but I can't seem to find out how to get the end points of a polyline segment / polyline.

I have a selected polyline 'pLineF', type esriGeometryPolyline, for which I want to know the start and end points.

I have been able to get at the extent (bounding rectangle) by:
pLineF.Shape.Envelope (as an IEnvelope)

I have tried using pointCollections but cannot seem to get the code right.

I don't need code, if you have any comments please, I just need a push in the right direction.

Cheers,
Tom

Re: Accessing the End Points of a Polyline Segment

NeilClemmons — Tue, 14 Dec 2010 17:55:05 GMT

Looks like you have an IFeature reference so just QI to IPolyline. Use IPolyline.FromPoint and IPolyline.ToPoint.

Re: Accessing the End Points of a Polyline Segment

TomGiles — Wed, 15 Dec 2010 14:26:00 GMT

Thanks for your quick reply Neil.

Believe it or not - and I don't even want to post this here - when I originally tried the [ipolyline] = [ifeature] 'QI' I forgot the .Shape ...

for others:

'where pFeat is an IFeature:

Dim pPolyline As IPolyline
pPolyline = pFeat.Shape 'QI

and then access pPolyline.FromPoint, etc

Really easy.

Thanks again Neil.
Tom